php enable error prompt

The first method: Change the values ​​of display_errors and error_reporting in the php.ini file. If not, add directly (recommended learning: PHP Programming From entry to proficiency)

; 第一处修改
; display_errors = Off
display_errors = On

; 第二处修改
; error_reporting = E_ALL & ~E_DEPRECATED & ~E_STRICT
error_reporting = E_ALL | E_STRICT

display_errors

Error echo is commonly used in development mode, but many applications forget to turn off this in the formal environment. options. Error echo can expose a lot of sensitive information, which facilitates the attacker's next attack. It is recommended to turn this option off.

display_errors = On

When in the on state, if an error occurs, an error will be reported and an error message will appear

dispaly_errors = Off

In the closed state, if an error occurs, it will prompt: Server error. But no error message will appear

The parameters that error_reporting can set are as follows:

Error reporting is a bit field. You can add up the numbers to get the desired level of error reporting.

E_ALL – All errors and warnings (excluding E_STRICT)

E_ERROR – Fatal runtime errors

E_WARNING – Runtime warnings (non-fatal errors)

E_PARSE – Compile-time parsing error

E_NOTICE – Run-time reminder (These are often caused by bugs in your code, or may be caused by intentional behavior.)

E_STRICT – Encoding standardization warning, allowing PHP to recommend how to modify the code to ensure optimal interoperability and forward compatibility.

E_CORE_ERROR - Fatal error during PHP startup initialization

E_CORE_WARNING - Warning (non-fatal error) during PHP startup initialization

E_COMPILE_ERROR - Fatal at compile time Sexual error

E_COMPILE_WARNING – compile-time warning (non-fatal error)

E_USER_ERROR – user-defined error message

E_USER_WARNING – user-defined warning message

E_USER_NOTICE – User-defined reminder message

Second method: Add the following two sentences in Apache’s httpd.conf file

php_flag display_errors on
php_value error_reporting 2039

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